222212001212111 has 4 divisors (see below), whose sum is σ = 222220237108824. Its totient is φ = 222203765315400.

The previous prime is 222212001212027. The next prime is 222212001212153. The reversal of 222212001212111 is 111212100212222.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 222212001212111 - 2¹⁰ = 222212001211087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222212001212171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4117907885 + ... + 4117961846.

It is an arithmetic number, because the mean of its divisors is an integer number (55555059277206).

Almost surely, 2^{222212001212111} is an apocalyptic number.

222212001212111 is a deficient number, since it is larger than the sum of its proper divisors (8235896713).

222212001212111 is an equidigital number, since it uses as much as digits as its factorization.

222212001212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8235896712.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 222212001212111 its reverse (111212100212222), we get a palindrome (333424101424333).

The spelling of 222212001212111 in words is "two hundred twenty-two trillion, two hundred twelve billion, one million, two hundred twelve thousand, one hundred eleven".